over Mombasa. 1825: Foundation of the Kingdom of AmaGaza, in Mozambique. 25 July 1826: Oman puts an end to the secession of Mombasa. 1828: Betsimisaraka and Tanibe are annexed to Madagascar. 1830: The Sultanate of Mwali (Mohéli) splits from the Sultanate of Ndzuwani (Anjouan), created by migrants from Madagascar. 1832: Boina is occupied by Madagascar. 1833: Maore (Mayotte) is annexed by Mohéli. 1834: Menabe is annexed to Madagascar. 19 November 1835: Maore is annexed from Mohéli by Anjouan. 1836: Maore proclaims independence from Anjouan. March 1836: The colony of Moçambique, Zambesi and Sofala is now known as Moçambique, also called Portuguese East Africa. 24 June 1837: Mombasa is annexed to Zanzibar. 1839: The Kingdom of Shewa proclaims independence from Ethiopia. 1840s: Foundation of the Kingdom of Nandi, in Kenya. First mention of the Sultanate of Geledi, in Somalia. 1840: Boina is annexed to Madagascar. 14 July 1840: Foundation of the French colony of Nossi-Bé, in Madagascar, a dependence of Bourbon Island, then of Mayotte from 25 March 1843. 25 March 1841: France establishes a protectorate over Maore under the name Mayotte as a dependency of Île Bourbon, officially from 13 June 1843, and abolishes the monarchy. 1842: Zanzibar annexes Kilwa Kisiwani. 1843: Antakarana is under a French protectorate until 1891. 6 September 1848: Bourbon Island is renamed Réunion Island. c. 1850: First mention of the Kingdom of Ussuwi, in Tanzania. 1853: Sainte-Marie de Madagascar becomes a separate colony until 27 October 1876 when it becomes a dependency of Réunion, then of Diégo Suarez 4 May 1888. 1855: Reunification of Ethiopia after a century of decentralization during the Zemene Mesafint. 1856: Zanzibar annexes Tumbatu. 1857: The United Kingdom annexes Changamire, under the administration of the British South Africa Company. c. 1858: First mention of the Kingdom of Buhera, in Zimbabwe. 1858: France settles in Obock, in Djibouti. Foundation of the Sultanate of Witu, in Kenya. c. 1860: First mention of the Kingdoms of Bugabo, Bukwara, Nguluhe, Ubena and Unyanyembe in Tanzania. 6 April 1861: Zanzibar proclaims independence from Oman, annexes Pemba and abolishes its autonomy from c. 1865. 1865: Egypt invades northern Ethiopia, temporarily occupying parts of what is now northern Eritrea. The Kingdom of Bwina proclaims independence from Kimwani. 1866: Anjouan is annexed to Mayotte. 1867: First mention of the Kingdom of Bugando, in Tanzania. 1870s: Foundation of the Kingdom of Maasai, in Kenya, after the union of the clans.